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Flood Risk Indicator

What is a Flood Risk Indicator?

The Flood Risk Indicator is a textual result indicating flood risk to registered land.

The Flood Risk Indicator combines Environment Agency Link opens in new window and Natural Resources Wales Link opens in new window flood data with HM Land Registry property data to provide customers with a high level indication of whether a piece of land is at risk of flooding.

The result is provided on a title-by-title basis for registered properties within England and Wales.

It is available via HM Land Registry's Find a property Service, providing customers with an instant online indicator of flood risk for the land they are interested in.

Please see: Flood Risk Indicator example Link opens in new window

Why is a Flood Risk Indicator useful to me?

The Flood Risk Indicator result is designed to increase awareness of the likelihood of flooding for any registered piece of land in England and Wales to encourage people living and working in areas prone to flooding to find out more and take appropriate action.

The Flood Risk Indicator can also be used by those people who wish to apply for planning permission to see whether the site they plan to develop is in a flood risk area. It will appeal to those involved in buying and selling houses, property owners and developers.

For further information see Environment Agency Link opens in new window and Natural Resources Wales Link opens in new window

How is a Flood Risk Indicator result produced?

Flood Risk Indicator combines HM Land Registry address data with Environment Agency Link opens in new window and Natural Resources Wales Link opens in new window flood data to identify flood risk for a registered piece of land within England and Wales.

The flood information from the Environment Agency combines detailed local data from modelling and mapping studies with information from a national model of England and Wales.

For rivers, detailed survey data information about the topography or ground surface is combined with information on flows.

For coastal areas, Environment Agency and Natural Resources Wales takes detailed survey data and combines it with analysed sea level and wave data. This allows it to work out the water level at the coast and how the water could flood inland.

Where detailed mapping is unavailable, the Environment Agency have supplemented its data with national generalised modelling, which gives a consistent picture of flood risk for all rivers with a catchment size greater than 3 km² and the sea.

What information does a Flood Risk Indicator result contain?

Flood Risk Indicator is a textual result indicating whether the registered land you are interested in is:

  • wholly outside of a floodplain and therefore also indicates how close the land is to the nearest floodplain
  • wholly within a floodplain and therefore also indicates the likelihood of that land being affected by flooding
  • affected by a floodplain and therefore also indicates the likelihood of flooding for the part of the land affected by the floodplain (unfortunately we are unable to indicate which specific part of land is affected)
What's included in the Environment Agency assessment of flood risk and what isn't?

The NaFRA includes flooding from all rivers with a catchment size greater than 3 km², and all flooding from the sea (both along the open coast and tidal estuaries). Smaller rivers are included in the assessment where they fall within the area that could be affected by an extreme flood (0.1% chance in any year). It does not include other forms of flooding such as from highway drains, sewers, overland flow or rising groundwater.

The assessment takes into account the type, location and condition of flood defences.

For further information see Environment Agency Link opens in new window and Natural Resources Wales Link opens in new window

Why doesn't the Environment Agency flood data include other forms of flooding in their data, as well as flooding from rivers and the sea?

The Environment Agency's National Flood Risk Assessment is of the risk of flooding from rivers and the sea. It is published online as the Risk of Flooding from Rivers and Sea Link opens in new window map. The Environment Agency also publishes maps of flooding from other sources, namely Risk of Flooding from Surface Water Link opens in new window and Risk of Flooding from Reservoirs Link opens in new window

For further information see Environment Agency Link opens in new window and Natural Resources Wales Link opens in new window

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